Direct-current rapid fuse

Abstract

The utility model discloses a direct current fast-acting fuse, and particularly relates to the technical field of fuses, the direct current fast-acting fuse comprises an openable fusion tube, a fuse body is arranged in the fusion tube, two sides of the fuse body are respectively connected with a conductive contact knife, and a fuse cap is arranged between the conductive contact knife and the fuse body; the opening and closing mechanism comprises a movable plate and a fixed seat which are arranged on one side of the fusion tube; according to the utility model, through the arrangement of the opening and closing mechanism, the fuse tube can be opened and closed, so that a worker can observe the state of an internal melt more conveniently, the conditions that circuit problems are difficult to diagnose quickly or a fuse is replaced and repair time is delayed are avoided, and diagnosis is convenient; and meanwhile, the problems that the safety risk of an operator is possibly increased when the circuit or the fuse is operated under the condition that an existing device is not clear and visible, the operator is likely to mistakenly consider that the circuit is safe, and then accidental electric shock or other dangers are caused are solved, and the safety during fuse maintenance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuses, in particular to a direct current fast fuse. Background Art

[0002] Fast-acting fuses are devices used for circuit protection. They are designed to quickly cut off circuits to prevent overcurrent from damaging circuits or equipment. When an overcurrent appears in a circuit, the fuse will quickly melt, open the circuit, and stop the current from continuing to flow, thereby helping to protect the components in the circuit from damage and preventing dangers such as fire.

[0003] A DC fast fuse is disclosed in a Chinese patent with application number CN202022208813.3. By setting the mounting plate and the conductive contact knife as an integrated structure, it is easy to install and can effectively improve the installation efficiency. By adopting a fuse cap, the fuse and the conductive contact knife are fixedly installed, which is easy to install and disassemble. The structure is simple, stable and reliable. By processing the end of the conductive contact knife into a rounded structure, it can effectively prevent the edges of the conductive contact knife from stabbing the operator, reducing the operating risk and improving the safety of use. However, it is difficult to open the fuse tube of the above-mentioned DC fast fuse when in use, which makes it inconvenient for the staff to observe the internal fuse, which may make it difficult to quickly diagnose circuit problems or replace fuses, delaying the repair time. When a circuit fails, it may become more difficult to diagnose the problem. At the same time, operating the circuit or fuse without clear observation may increase the safety risk of the operator, and it is easy to mistakenly believe that the circuit is safe, thereby causing accidental electric shock or other dangers. Utility Model Content

[0004] The purpose of the utility model is to provide a DC fast fuse, which can realize the opening and closing of the fuse tube through the setting of the opening and closing mechanism, so that the staff can observe the state of the internal fuse more conveniently, avoid the difficulty in quickly diagnosing circuit problems or replacing fuses, and delay the repair time, so that when a circuit fails, it makes it easier to diagnose the problem. At the same time, it solves the problem that the existing device may increase the safety risk of the operator when operating the circuit or fuse without clear visibility, and it is easy to mistakenly believe that the circuit is safe, thereby causing accidental electric shock or other dangers. The safety of fuse maintenance is greatly improved to solve the above-mentioned deficiencies in the technology.

[0005] In order to achieve the above object, the utility model provides the following technical solution: a DC fast fuse, comprising:

[0006] An openable melting tube, wherein a melt is installed inside the melting tube, conductive contact knives are connected to both sides of the melt, and a melting cap is installed between the conductive contact knives and the melt;

[0007] An opening and closing mechanism is provided, wherein the opening and closing mechanism is located on one side of the melting tube and is used to open and close the melting tube. The opening and closing mechanism comprises a movable plate and a fixed seat installed on one side of the melting tube and a positioning mechanism arranged between the movable plate and the fixed seat, and a protective mechanism is arranged between the positioning mechanism and the fixed seat to protect the positioning mechanism.

[0008] Preferably, the positioning mechanism includes an opening and closing block fixed to the bottom of the movable plate and a positioning groove opened on the top of the fixed seat, the opening and closing block corresponds to the positioning groove, and a plug-in mechanism for plugging the opening and closing block is provided between the positioning groove and the fixed seat.

[0009] Preferably, the plug-in mechanism includes a positioning hole opened inside the opening and closing block and a positioning rod plugged into the positioning groove, a fixing plate is fixed on one side of the fixing seat, the positioning rod is plugged into the fixing plate, and the positioning rod is plugged into the positioning hole, the positioning rod extends to one side of the fixing plate and is fixed with a control rod.

[0010] Preferably, a reset mechanism for resetting the positioning rod is provided between the positioning rod and the fixed plate, the reset mechanism includes a reset groove opened on one side of the fixed seat and a baffle fixed on the outer wall of the positioning rod, a spring is connected between the baffle and the fixed plate, the spring is sleeved on the outer wall of the positioning rod, and the baffle corresponds to the reset groove.

[0011] Preferably, the protective mechanism includes a fixed rod installed on one side of the fixed seat and a rotating shaft rotatably installed on one side of the fixed rod, a protective seat is fixed on one side of the rotating shaft, a protective plate is fixed on one side of the protective seat, the protective plate is in conflict with the control rod, a limiting mechanism for limiting the rotating shaft is arranged between the rotating shaft and the fixed rod, and a fixing mechanism for fixing the protective seat is arranged between the protective seat and the fixed seat.

[0012] Preferably, the limiting mechanism comprises a plurality of limiting holes formed on the outer wall of the rotating shaft and a limiting seat movably mounted on one side of the fixing rod, a limiting rod is fixed to one side of the limiting seat, and the limiting rod corresponds to the limiting holes.

[0013] Preferably, the fixing mechanism comprises a support plate fixed to one side of the fixing seat, a stopper is fixed to one side of the support plate, and the stopper corresponds to the fixing seat.

[0014] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0015] 1. The utility model can realize the opening and closing of the fuse tube through the setting of the opening and closing mechanism, so that the staff can observe the state of the internal fuse more conveniently, avoid the situation that it is difficult to quickly diagnose the circuit problem or replace the fuse, and delay the repair time. When the circuit fails, it makes it easier to diagnose the problem. At the same time, it solves the problem that the existing device may increase the safety risk of the operator when operating the circuit or fuse without clear visibility, and it is easy to mistakenly believe that the circuit is safe, thereby causing accidental electric shock or other dangers, which greatly improves the safety of fuse maintenance;

[0016] 2. The utility model can protect the control rod by setting a protective mechanism to prevent the fuse from being accidentally opened due to accidental touching of the control rod during work, which helps to reduce the risk of accidental electric shock or other safety accidents, improves the safety of users and maintenance personnel, reduces the possibility of misoperation, and ensures the stable operation of the circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the utility model when the melting tube is opened;

[0020] Figure 3 It is a structural schematic diagram of the opening and closing mechanism of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the opening and closing mechanism of the utility model when it is disassembled;

[0022] Figure 5 This is one of the structural diagrams of the protection mechanism of the utility model;

[0023] Figure 6 This is the second structural diagram of the protective mechanism of the utility model.

[0024] Description of reference numerals:

[0025] 1. Melt tube; 2. Melt cap; 3. Conductive contact knife; 4. Opening and closing mechanism; 5. Protection mechanism; 6. Melt;

[0026] 41. movable plate; 42. fixed seat; 43. fixed plate; 44. control rod; 45. opening and closing block; 46. spring;

[0027] 51. Fixed rod; 52. Support plate; 53. Rotating shaft; 54. Protective seat; 55. Stopper. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0029] The utility model provides Figure 1 and Figure 2 A DC fast fuse is shown, comprising: an openable fuse tube 1, a fuse 6 is installed inside the fuse tube 1, conductive contact knives 3 are connected to both sides of the fuse 6, and a fuse cap 2 is installed between the conductive contact knives 3 and the fuse 6.

[0030] As can be seen from the above, when in use, the conductive contact blade 3 is connected to the place where it is needed, and the fuse 6 can be used to protect the current, thereby completing the installation and use of the DC fast fuse.

[0031] refer to Figure 2-Figure 4 As shown, an opening and closing mechanism 4 is located on one side of the melting tube 1, and is used to open and close the melting tube 1. The opening and closing mechanism 4 includes a movable plate 41 and a fixed seat 42 installed on one side of the melting tube 1, and a positioning mechanism arranged between the movable plate 41 and the fixed seat 42. A protective mechanism 5 for protecting the positioning mechanism is arranged between the positioning mechanism and the fixed seat 42. The positioning mechanism includes an opening and closing block 45 fixed at the bottom of the movable plate 41 and a positioning groove opened at the top of the fixed seat 42. The opening and closing block 45 corresponds to the positioning groove, and a plug-in mechanism for plugging the opening and closing block 45 is arranged between the positioning groove and the fixed seat 42.

[0032] Through the above technical solution:

[0033] When in use, the opening and closing block 45 is plugged in through the plug-in mechanism, so that the opening and closing block 45 can be effectively positioned in the positioning groove, and then the positioning of the opening and closing block 45 is canceled again through the plug-in mechanism, so that the melting tube 1 can be opened and closed, making it more convenient for the staff to observe the state of the internal fuse 6, avoiding the difficulty in quickly diagnosing circuit problems or replacing fuses, and delaying the repair time. When a circuit fails, it makes it easier to diagnose the problem. At the same time, it solves the problem that the existing device may increase the safety risk of the operator when operating the circuit or fuse without clear visibility, and it is easy to mistakenly believe that the circuit is safe, which may cause accidental electric shock or other dangers. It can greatly improve the safety of fuse maintenance.

[0034] Regarding the above-mentioned plug-in mechanism, Figure 4As shown, the plug-in mechanism includes a positioning hole opened inside the opening and closing block 45 and a positioning rod plugged into the positioning groove. A fixing plate 43 is fixed to one side of the fixing seat 42. The positioning rod is plugged into the fixing plate 43, and the positioning rod is plugged into the positioning hole. The positioning rod extends to one side of the fixing plate 43 and is fixed with a control rod 44. Based on this, the positioning rod is driven to move by the control rod 44, and the positioning rod is separated from the positioning groove by the movement of the positioning rod. The positioning rod is separated from the positioning hole by the mutual separation of the positioning rod and the positioning groove, so that the user can control the opening and closing block 45 and open and close the melting tube 1 in time.

[0035] Furthermore, a reset mechanism for resetting the positioning rod is provided between the positioning rod and the fixing plate 43. The reset mechanism includes a reset groove provided on one side of the fixing seat 42 and a baffle fixed on the outer wall of the positioning rod. A spring 46 is connected between the baffle and the fixing plate 43. The spring 46 is sleeved on the outer wall of the positioning rod, and the baffle corresponds to the reset groove. Based on this, the movement of the positioning rod drives the baffle to move, and the movement of the baffle drives the spring 46 to contract. The elastic force of the spring 46 enables the positioning rod to be reset when the positioning rod is released, thereby preventing the user from forgetting to reset the positioning rod.

[0036] In addition, refer to Figure 3 , Figure 5 and Figure 6 As shown, the protection mechanism 5 includes a fixed rod 51 installed on one side of the fixed seat 42 and a rotating shaft 53 rotatably installed on one side of the fixed rod 51, a protection seat 54 is fixed to one side of the rotating shaft 53, a protection plate is fixed to one side of the protection seat 54, the protection plate is in conflict with the control rod 44, a limiting mechanism for limiting the rotating shaft 53 is arranged between the rotating shaft 53 and the fixed rod 51, and a fixing mechanism for fixing the protection seat 54 is arranged between the protection seat 54 and the fixed seat 42.

[0037] Through the above technical solution:

[0038] When in use, the rotating shaft 53 is no longer limited by the limiting mechanism, and then the rotating shaft 53 is rotated to drive the protective seat 54 to rotate, and the rotation of the protective seat 54 drives the protective plate to move until the protective plate and the control rod 44 form a conflict, and the rotating shaft 53 can be limited. In this way, the control rod 44 can be protected to prevent the control rod 44 from being accidentally touched during work, which may cause the fuse 1 to be accidentally opened, thereby helping to reduce the risk of accidental electric shock or other safety accidents, improve the safety of users and maintenance personnel, reduce the possibility of misoperation, and ensure the stable operation of the circuit.

[0039] Regarding the above-mentioned limiting mechanism, Figure 6As shown, the limiting mechanism includes a plurality of limiting holes provided on the outer wall of the rotating shaft 53 and a limiting seat movably mounted on one side of the fixed rod 51. A limiting rod is fixed on one side of the limiting seat, and the limiting rod corresponds to the limiting hole. Based on this, the movable limiting seat drives the limiting rod to move, and the limiting rod is separated from the limiting groove by the movement of the limiting rod. The rotating shaft 53 can rotate by the mutual separation of the limiting rod and the limiting groove.

[0040] Further, regarding the above-mentioned fixing mechanism, Figure 5 As shown, the fixing mechanism includes a support plate 52 fixed to one side of the fixing seat 42, and a stopper 55 is fixed to one side of the support plate 52, and the stopper 55 corresponds to the fixing seat 42. Based on this, when the protection seat 54 rotates to conflict with the stopper 55, the protection seat 54 will not rotate again, thereby fixing the protection seat 54, and preventing the protection seat 54 from rotating too much and losing the protection of the control rod 44.

[0041] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A DC fast fuse, characterized in that: include: An openable melting tube (1), wherein a melt (6) is installed inside the melting tube (1), conductive contact knives (3) are connected to both sides of the melt (6), and a melting cap (2) is installed between the conductive contact knives (3) and the melt (6); An opening and closing mechanism (4) is located on one side of the melting tube (1) and is used to open and close the melting tube (1). The opening and closing mechanism (4) comprises a movable plate (41) and a fixed seat (42) installed on one side of the melting tube (1), and a positioning mechanism arranged between the movable plate (41) and the fixed seat (42). A protection mechanism (5) is arranged between the positioning mechanism and the fixed seat (42) to protect the positioning mechanism.

2. A DC fast fuse according to claim 1, characterized in that: The positioning mechanism comprises an opening and closing block (45) fixed at the bottom of the movable plate (41) and a positioning groove provided at the top of the fixing seat (42); the opening and closing block (45) corresponds to the positioning groove, and a plug-in mechanism for plugging the opening and closing block (45) is provided between the positioning groove and the fixing seat (42).

3. A DC fast fuse according to claim 2, characterized in that: The plug-in mechanism comprises a positioning hole provided inside the opening and closing block (45) and a positioning rod plugged into the positioning groove; a fixing plate (43) is fixed to one side of the fixing seat (42); the positioning rod is plugged into the fixing plate (43) and the positioning rod is plugged into the positioning hole; the positioning rod extends to one side of the fixing plate (43) and is fixed with a control rod (44).

4. A DC fast fuse according to claim 3, characterized in that: A reset mechanism for resetting the positioning rod is arranged between the positioning rod and the fixing plate (43), the reset mechanism comprising a reset groove provided on one side of the fixing seat (42) and a baffle fixed on the outer wall of the positioning rod, a spring (46) is connected between the baffle and the fixing plate (43), the spring (46) is sleeved on the outer wall of the positioning rod, and the baffle corresponds to the reset groove.

5. A DC fast fuse according to claim 3, characterized in that: The protection mechanism (5) comprises a fixed rod (51) mounted on one side of a fixed seat (42) and a rotating shaft (53) rotatably mounted on one side of the fixed rod (51); a protection seat (54) is fixed on one side of the rotating shaft (53); a protection plate is fixed on one side of the protection seat (54); the protection plate is in contact with the control rod (44); a limiting mechanism for limiting the rotating shaft (53) is provided between the rotating shaft (53) and the fixed rod (51); and a fixing mechanism for fixing the protection seat (54) is provided between the protection seat (54) and the fixed seat (42).

6. A DC fast fuse according to claim 5, characterized in that: The limiting mechanism comprises a plurality of limiting holes formed on the outer wall of the rotating shaft (53) and a limiting seat movably mounted on one side of the fixing rod (51); a limiting rod is fixed on one side of the limiting seat, and the limiting rod corresponds to the limiting hole.

7. A DC fast fuse according to claim 5, characterized in that: The fixing mechanism comprises a support plate (52) fixed to one side of the fixing seat (42), a stopper (55) being fixed to one side of the support plate (52), and the stopper (55) corresponding to the fixing seat (42).

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